Loom shuttle



J. J. KAUFMANN, JR

Oct. 8, 1946.

Patented Oct. 8 1946 UNITED STATES PATENT OFFICE LM SHUTTLE: I John J. Kaurmann, Jr., Greenville; s 04. assignor' to- Steel Heddle Manufacturing-Company, Philadelphia, Pa., a' corporation of Pennsylvania; Application April 12, 1944', Serial No. amete 4 Claims. (c1. 139 220) This. invention relates to shuttles for looms, and

it relates more particularly to the provision, in

automatically threading loomshuttles, of means for minimizing the tendency of the shuttles to become unthreaded orof the filling yarn to become fouled on parts of the thread'ing'block during'the operation of the loom.

In. the shuttles which are used in the modern types of" high speed automatic looms, a threading block is usually provided at the'rear end ofthe shuttle. I Such-threading blocks are made in various shapes and styles and are designed to cause the filling yarn, after an empty bobbin has been displaced and a full one substituted therefor, to be threaded automatically through the threading block, and thence through a side delivery eye, the threading action usually starting on the first pick of the shuttle and being completed on the return pick thereof.

However in the operation of the loom, particularly in the modern high speed looms, there is a tendency of the filling yarn to balloon and to swirl, and also, when reversal of movement of the shuttle, takes place, there is sometimes a tendency of the filling yarn to unthread itself by an overcast of the yarn, and this often occurs notwithstanding the threading block is primarily designed to prevent the same.

Furthermore it sometimes happens that when an overcast of the yarn takes place a loop is formed which becomes fouled on one of the parts of the threading block and results in breaking of the filling yarn and consequent stoppage of the loom.

The principal object of the present invention is to provide simple, eflicient and inexpensive means for overcoming the tendencies above referred to and to insure proper passage of the filling yarn through the threading block to the side delivery eye.

The nature and characteristic features of the invention will be more readily understood from the following description, taken in connection with the accompanying drawing forming part hereof, in which:

Figure 1 is a top or plan view of the threading end portion of a loom shuttle having a threading block provided with means embodying the main features of the present invention;

Fig. 2 is a longitudinal central sectional view of the portion of the shuttle shown in Fig, 1;

Fig. 3 is a front elevation, enlarged, of the threading block removed from the shuttle;

Fig. 4 is a side elevation, partly in section, and also enlarged, of said threading block; and

Fig. 5 is. an underneath plan view, also em larged, of the front end portion of said threading block. I i I It should, of course; be understood that the de script-ion and drawing herein are illustrative merely, and that various modifications and changesmay be made in the structure disclosed without departin'g'imm the spirit of the invert til-0111' Referfing tothe drawing, in'the parti"(:lilaiem bodiment of the invention therein shown, the shuttle body It! is preferably made of wood and has the usual bobbin chamber II in which the bobbin I2 is held by the usual means (not shown) whereby it may be readily discharged therefrom and a new bobbin substituted as the filling runs out from time to time.

The shuttle body In is also provided with the usual side delivery eye l3 for the passage of the filling yarn M. The threading block l5 comprises primarily a casting, preferably made of metal, either cast iron or brass, as desired. Said threading block I5 is mounted in a complementally shaped recess l6 in the rear end of the body portion IU of the shuttle.

The body portion of the threading block I5 is provided with a longitudinal channel I? through which the filling thread I4 passes to the side delivery eye l3 during the weaving operation,

The threading block I5 may be provided with the usual rearwardly extending horn portion l8, and an intermediate horn portion l9 extending into the longitudinal thread channel I! of the threading block IE, or the threading block may be provided with other similar portions which serve to assist in or bring about the initial threading of the block, as well as the retention of the filling thread therein after the initial threading has been completed.

At the front end of the threading block 15, that is the end disposed toward the bobbin, there is provided, on each side of the thread channel IT, a vertical groove or recess 20. Preferably said side recesses 20 extend upwardly from the bottom of the threading block to a point below the top thereof, the casting preferably having a suitable overhang Zl at this point on each side for the purpose of guiding the filling yarn during the threading operation.

In each of the grooves or recesses 20 there is mounted a strip 22 of fur, the hair or fiber of which is of a relatively fine texture. The texture of the fur employed will to a certain extent be dependent on the size of the filling yarn.

Advantage is taken of the fact that the fibers is once threaded in the threading block IS, the

strips 22 of fur between which the filling yarnpasses as it enters the threading block l5 will efiectively serve to prevent the filling yarn- NY from being cast out from the entrance endot the threading block I5 either because of the" ballooning of the same, or through an overcast when reversal of movement of the shuttle takes place. Also fouling of overcast loops on horn members l8 and IQ of the threading block l5 will be effectively prevented.

claimz 1. In a loom shuttle having a threading block mounted inone end thereof and provided with a longitudinal thread channel through which the filling yarn passes from the bobbin to the outlet, stripsof fur mounted at the entrance. end of the threading block, the hairvfilaments of said fur being disposed at a downward inclination and respectively contacting the hair filaments of the opposite strip),

portions of which are mounted in the aforesaid 1 recesses; and the hair filaments of which extend from the skin on each side at a downward inclination.

3. In a loom shuttle having a, threading block mounted in one end thereof and provided with a longitudinalthread channel through which the filling yarn passes from the bobbin to the outlet, the threading block having a vertical recess on each side of the thread channel at the entrance end thereof, and strips of fur the skin portions of which are mounted in the aforesaid recesses and the hair filaments of which are disposed-eta downward inclination and respectively contact the hair filaments of the opposite strip.

4, a loom shuttle having a threading block mounted in one end thereof and provided with a longitudinal thread channel through which filling yarn passes from the bobbin to the outlet, and a strip of fur mounted at the entrance end of the threading block on at least one side thereof, the hair filament of said fur being disposed at a downward inclination.

- JOHN J. KAUFMANN, JR. 

